The act of holding down and orally fellating a man, almost always about power, thus never gay.
Typically the art of rape blow is done by males to a weaker more feminine male, but can on rare occasion be done by a female who desperately wants to fellate in an often vain attempt to obtain a firm genital grounding.
Dude did you see that? Yeah man that was clearly about power. He got put in his place by that skilled rape blow.